I was able to visit the public document server at https://doc.onlyoffice.com/welcome/, make a copy of the AllFOnts.js file on that site and copy it to my document server. My OnlyOffice installation now works correctly.

I assume that AllFont/js was not being generated during the installation process or is missing from the installer package

Hello sbeaver!Please send us logs /var/log/onlyoffice/documentserver.support@onlyoffice.com with link to your post in subject or attach archive to your post here.Maybe there is a font in your system which causes errors of OO installation.